HDS 7/12 M, HDS 8/18 M, HDS 9/18 M, HDS 10/20 M, HDS 12/18 S, HDS 13/20 S Service Manual

HDS 7/12 M, HDS 8/18 M, HDS 9/18 M, HDS 10/20 M, HDS 12/18 S, HDS 13/20 S Service Manual English 5.906-432.0 Rev. 00 (06/15) 1

1 Contents 2 Preface 5 3 Safety instructions 5 3.1 Hazard levels 5 4 Technical Features 5 4.1 General 5 4.2 Connection performance of appliance 5 4.3 Pump 5 4.4 Electronics system 5 4.5 Detergent 5 4.6 Accessories 6 4.7 Field of application 6 4.8 Type plate 6 5 Parts of the system 7 5.1 Front view 7 5.2 View from the back, (device without hose reel) 8 5.3 View from the back, (device with hose reel) 9 5.4 Operator console 10 5.4.1 Control panel with LED indicator 10 5.4.2 Template numerical value display 13 5.4.3 Control panel, view from the inside 15 5.4.4 Printed circuit board, control panel 16 5.4.5 Control panel with display indication (HDS 13/20 only) 17 6 Function 18 6.1 Operating displays 18 6.2 Maintenance operating fluids 18 6.3 Setting liquid softener 19 6.4 SB mode 19 6.5 Storage compartments 20 6.6 Cover 21 6.7 View from the right, cover removed 22 6.7.1 Revised device design (with filter before the pump and electronic ignition transformer) 23 6.8 Service switch 24 6.9 Fuel tank 25 6.10 Liquid softener 26 6.10.1 Feed via tank (export variant) 26 6.10.2 Feed via RFID (Europe variant) 27 6.10.3 Functionality RFID 29 6.11 Swimmer tank 30 6.12 Detergent Tank 31 6.12.1 Detergent tank 1 31 6.12.2 Detergent tank 2 32 6.13 Detergent dosing valve 33 6.14 Motor (air-cooled) 34 6.14.1 Motor (air-cooled) 35 6.15 Electrical box, air-cooled motor 36 6.16 Engine (water-cooled) 37 6.16.1 Engine (water-cooled) 38 6.16.2 Electrical box, water-cooled engine 39 6.17 Pump 40 6.17.1 Revised version with filter before the pump 41 6.18 Safety block 42 6.19 Safety block (water shortage safeguard old) 43 6.19.1 Water shortage safeguard as cartridge 44 2 English 5.906-432.0 Rev. 00 (06/15)

6.19.2 Safety block (water shortage safeguard new) 44 6.19.3 Function water shortage safeguard and dry-run protection 45 6.19.4 Function of safety valve 45 6.20 Burner blower with fuel pump 46 6.21 Booster heater (with ignition transformer) 48 6.22 Booster heater (with ignition transformer new) 49 6.22.1 Type plate of heating coil 49 6.22.2 Ignition transformer 50 6.22.3 Flame sensor with holder on the burner 50 6.22.4 Sectional view booster heater 51 6.23 Burner 53 6.24 Burner 54 6.25 Output, booster heater 55 6.26 Hand spraygun 56 6.27 Pressure and volume regulation 57 6.28 Functional diagram of pressure water operation (water-cooled motor) 58 6.29 Functional diagram vacuuming operation 60 6.30 Vacuuming operations 62 6.31 Pressure and volume regulation 63 6.31.1 Function pressure and volume regulation 64 6.32 Functional description of pressure switch 65 6.32.1 Appliance is switched off 65 6.32.2 The appliance is switched on and the gun is open 66 6.32.3 Gun is closed 67 6.32.4 The gun is reopened when the appliance is switched on 68 7 Basic settings and service procedures 69 7.1 Remove the hose drum 69 7.1.1 Uninstall / install high-pressure hose 69 7.1.2 Renew O-rings axle, hose reel 70 7.1.3 Uninstall / install pipeline with axle 72 7.2 Uninstall / install pressure gauge 73 7.3 Adjust safety valve 74 7.4 Service functions with LED display 75 7.5 Set up the switching off process 76 7.6 Set up the leakage behaviour 76 7.7 Brightness value of the flame sensor 77 7.8 RFID query 78 7.9 Testing the temperature sensor 78 7.10 Testing the water temperature setting and the programme switch 79 7.11 Testing the service switch 82 7.12 Testing the sensor 83 7.13 Error memory 84 7.14 Operating hours 86 7.15 Gun switching operations since gun service 87 7.16 Gun services 88 7.17 Gun switches since initial startup 90 7.18 Operation duration of the burner since burner service 91 7.19 Burner service 92 7.20 Burner operation since initial startup 94 7.21 Operating hours of the pump since pump service 95 7.22 Pump service 96 7.23 Pump operation since initial startup 98 7.24 Servicefunktionen mit Displayanzeige 99 7.25 Set up the switching off process 100 7.26 Set up the leakage behaviour 100 7.27 RFID query 101 English 5.906-432.0 Rev. 00 (06/15) 3

7.28 Brightness value of the flame sensor 101 7.29 Testing the temperature sensor 101 7.30 Testing the water temperature setting and the programme switch 102 7.31 Test service switch 102 7.32 Testing the sensors 103 7.33 Error memory 104 7.34 Operating hours 106 7.35 Gun switching operations since gun service 106 7.36 Gun services 106 7.37 Gun services since initial startup 106 7.38 Operation duration of the burner since startup 107 7.39 Burner service 107 7.40 Burner operation since initial startup 107 7.41 Operating hours of the pump since pump service 107 7.42 Pump services 108 7.43 Pump operation since initial startup 108 7.44 Quick overview for reading the service functions 109 7.45 Reset of the maintenances 109 7.46 Overview of a quick check of the device status 110 7.47 Settings, burner 111 7.48 Installation air duct on the outer jacket 112 7.49 Adjusting the working pressure with the rotary regulator on the gun 113 7.49.1 Setting the maximum working pressure 113 7.49.2 Setting the minimum working pressure 114 7.50 Setting the working pressure with standard gun without rotary knob 115 7.50.1 Setting the maximum working pressure 115 7.50.2 Setting the minimum working pressure 116 8 Care and maintenance 116 9 Troubleshooting 117 9.1 Error messages 118 9.2 Error message with service demand 119 10 Technical specifications 120 10.1 Tightening torques 120 11 Special tools 121 12 Circuit diagram 124 4 English 5.906-432.0 Rev. 00 (06/15)

2 Preface Good service work requires extensive and practice-oriented training as well as well-structured training materials. Hence we offer regular basic and advanced training programmes covering the entire product range for all service engineers. In addition to this, we also prepare service manuals for important appliances - these can be initially used as instruction guides and later on as reference guides. Apart from this, we also regular information about product enhancements and their servicing. If you should require supplements, have corrections or questions regarding this document, please address these citing the following subject to: 3 Safety instructions international-service@de.kaercher.com Subject: Fall 105756 The responsible product specialist will take care of your issue. Copying and duplication of texts and diagrams as well as third-party access to this information is permitted only with the explicit permission of the company: Alfred Kärcher GmbH & Co. KG Postfach 160 71349 Winnenden (Germany) www.kaercher.com 3.1 Hazard levels DANGER Immediate danger that can cause severe injury or even death. WARNING Possible hazardous situation that could lead to severe injury or even death. 4 Technical Features CAUTION Possible hazardous situation that could lead to mild injury to persons or damage to property. 4.1 General Mobile hot water high-pressure cleaners in various performance classes for commercial use. High performance burner with upright heating coal and continuous ignition Built-in calcification protection 4.2 Connection performance of appliance 3,4 kw (HDS 7/12-4 M/MX) 5,5 kw (HDS 8/18-4 M/MX) 6,4 kw (HDS 9/18-4 M/MX) 4.3 Pump 3 piston axial pump with stainless steel piston; some models feature ceramic coating Cylinder head made of brass High-pressure and suction valve faces made of stainless steel Working pressure: 3-20 MPa (30-200 bar) 4.4 Electronics system Program selection switch Flame sensor (option) Water temperature regulation with temperature sensor Exhaust temperature monitor Water shortage safeguard Dry-run protection for the pump 4.5 Detergent 2 detergent tanks Detergent inlet with fine filter Steam operation (water temperatures up to 155 C) with separate steam nozzle Burner blower and fuel pump directly on the electric motor ECO - mode for 60 C (+/- 9 K) 7,8 kw (HDS 10/20-4 M/MX) 8,4 kw (HDS 12/18-4 S/SX) 9,3 kw (HDS 13/20-4 S/SX) Water quantity: 350-1,300 l/h Manometer Overflow valve with pressure and quantity regulation Float tank Safety valve Water fine filter Level sensor for fuel, liquid softener and detergent tanks (optional in some cases) Operating hour counter Error memory Component tests Fault monitoring Monitoring of rotation direction Dosing valve on the device with automatic clear rinsing in zero position. Detergent with low pressure and high pressure English 5.906-432.0 Rev. 00 (06/15) 5

4.6 Accessories Rotary regulator for pressure and quantity regulation Soft grip - easy press gun Stainless steel spray lance, rotating 4.7 Field of application HDS 7/12-4 M/MX HDS 8/18-4 M/MX HDS 9/18-4 M/MX 4.8 Type plate Power nozzle (stainless steel) Steam nozzle (brass) HDS 10/20-4 M/MX HDS 12/18-4 S/SX HDS 13/20-4 S/SX 1 Appliance description 2 Connection output 3 Type of protection 4 Part number 5 Bar code. Contains part and serial number. 6 Address of manufacturer 7 Serial number 8 Year of manufacture 9 Max. operating over-pressure 10 Flow rate 11 Working pressure 12 Main Supply 6 English 5.906-432.0 Rev. 00 (06/15)

5 Parts of the system 5.1 Front view 1 Push handle 2 Cover, upper storage compartment 3 Safety catch, soft grip - easy press gun 4 Rotating regulator 5 Hand lever 6 Soft grip - easy press gun 7 Lock for fuel tank 8 High pressure hose 9 Rotating spray lance 10 High pressure nozzle 11 Transport wheel (2x) 12 Transport bracket 13 Steering roller 14 Steering roller with fixed position brake 15 Chassis 16 Cover 17 Exhaust nozzle 18 Lock of appliance hood English 5.906-432.0 Rev. 00 (06/15) 7

5.2 View from the back, (device without hose reel) 1 Indicator lamps 2 Programme selector switch (Q1) 3 Storage spray pipe 4 Setting, water temperature 5 Closure, liquid softener tank 6 Storage, power cord 7 Storage compartment 8 Supply Cord 9 Closure detergent tank 2 10 High pressure outlet 11 Chassis 12 Water connection with water fine filter 13 Tread 14 Closure detergent tank 1 15 Storage high-pressure hose 16 Closure fuel tank 17 Setting detergent dosing unit 18 Storage spray pipe 19 Manometer 20 Cover, upper storage compartment 8 English 5.906-432.0 Rev. 00 (06/15)

5.3 View from the back, (device with hose reel) 1 Indicator lamps 2 Programme selector switch (Q1) 3 Storage spray pipe 4 Setting, water temperature 5 Closure, liquid softener tank 6 Storage, power cord 7 Hose reel, high-pressure hose 8 Supply Cord 9 Closure detergent tank 2 10 Crank, hose drum 11 Recess hose reel lock 12 Chassis 13 High pressure hose 14 Water connection with water fine filter 15 Tread 16 Closure detergent tank 1 17 Storage high-pressure hose 18 Lock for fuel tank 19 Setting detergent dosing unit 20 Storage spray pipe 21 Manometer 22 Cover, upper storage compartment English 5.906-432.0 Rev. 00 (06/15) 9

5.4 Operator console 5.4.1 Control panel with LED indicator 1 Control LED 0, pump (red) Note Symbol depending on unit model. 2 Control LED 1, rotation direction (red) 3 Control LED 2, operation (green) 4 Control LED 3, fuel (yellow) 5 Control LED 4, detergent tank 1 (yellow) 6 Control LED 5, motor (red) 7 Control LED 6, burner (red) 8 Control LED 7, service (orange) 9 Control LED 8, liquid softener (yellow) 10 Control LED 9, detergent tank 2 (yellow) 11 Programme switch position "Off" 12 Programme switch position "Cold water operation" 13 Programme switch position "ECO mode" 14 Programme switch position "Hot water / steam operation" 15 Programme switch 16 Setting, water temperature 17 Dosage valve for detergent 18 Dosing range detergent tank 1 19 Dosing range detergent tank 2 20 Manometer Note In the "ECO mode the water temperature is maintained at 60? (+/- 9 K). Set water temperatures < 60 C are effective, <60? remain ineffective. 10 English 5.906-432.0 Rev. 00 (06/15)

LED no. Symbol Activity Meaning / measure 0 1 x blinking Lack of oil. Check/fill oil level of the high pressure pump; repair leaks. 2 x blinking Leakage. 10 short startups. Check the high-pressure system for leaks. 3 x blinking Dry running (2 minutes). Check / ensure the water supply. 4 x blinking Reed switch or solenoid is sticky. Check safety block/ repair reed switch. 1 1 x blinking Motor turns in the wrong direction. Switch off the device and turn the phase inverter in the unit plug by 180. 2 glow The appliance is now ready for operation. 1 x blinking Either the device was in continuous operation for 30 minutes or in standby mode for 30 minutes. 3 glow Fuel tank empty; fill fuel. 4 glow Detergent tank 1 is empty. Refill detergent (only HDS 12/18) 5 1 x blinking Fault in the motor contactor (motor current below 1.5 A for 3 seconds although the contactor has switched). Check / replace the contactor. 2 x blinking Coiling protection contact open/defective. Determine/eliminate cause. Replace the engine. 3 x blinking Current asymmetry or low voltage or overvoltage. Check the mains connection. 4 x blinking Excessive power consumption. Check mechanics for resistance. Check the mains connection. English 5.906-432.0 Rev. 00 (06/15) 11

LED no. Symbol Activity Meaning / measure 6 1 x blinking Exhaust thermostat open. Check/replace emission temperature/ thermostat. Perform maintenance on the burner. 2 x blinking Flame sensor reports burner fault. Clean and check the burner, ignition and fuel system. 3 x blinking RFID write-read electronics is defective - replace. 4 x blinking Fault water temperature sensor. Cable break (temperature below -5 C, although the burner is on) or short circuit (temperature above 220 C for a longer period of time). The device switches off after approx. 10 seconds. 7 glow Service tasks due: 400h burner 600h pump 80000 gun switching operations 8 glow Softener level switch detects empty condition or the units on the tag of the softener bottle have been consumed. 1 x blinking 5 hours of after-running time elapsed, burner is locked. Insert new softener bottle. 9 glow Detergent tank 2 is empty. Refill detergent (only HDS 12/18) Note Tag is an electronic component on the new square softener bottle. The tag is located behind the bottle label. The tag can be read and written on electronically (also see 6.10.3 "Functionality RFID"). 12 English 5.906-432.0 Rev. 00 (06/15)

5.4.2 Template numerical value display For the better distinguishability of numeric value displays in the service functions the template below can be placed on the LED displays of the control panel. English 5.906-432.0 Rev. 00 (06/15) 13

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5.4.3 Control panel, view from the inside 1 Service switch and dosing liquid softener 2 Control transformer T1 3 Transducer 4 Fuse 2.0 AT for control transformer AT: (6.644-052) 5 Terminal strip 6 Ground point 7 Supply Cord 8 Setting, water temperature 9 Programme switch 10 Control chip 11 Detergent dosing valve 12 Manometer 13 Exhaust temperature monitor 14 Cable comb English 5.906-432.0 Rev. 00 (06/15) 15

5.4.4 Printed circuit board, control panel 1 Connection, level sensor detergent tank 1 2 Connection, level sensor detergent tank 2 3 Connection of level sensor for fuel tank 4 Connection of level sensor for liquid softener 5 Transducer connection 6 Connection flame sensor 7 Temperature sensor connection 8 DIP switch 9 Connection programme switch 10 Connection RFID 11 Service switch connection 12 Connection water temperature setting 13 PCB motor distributor connection 14 Grounding connection control PCB 15 Control transformer T1 connection 16 Connection control transformer T2 (option) 17 Connection exhaust temperature monitor 18 Connection, lack of water fuse 19 Connection of solenoid valve for liquid softener 20 Connection without function 21 Connection without function DIP switch By changing these settings the following functions can be activated: DIP1 on: One-phase device DIP1 off: Three-phase device DIP2 on: With flame sensor. DIP2 off: Ohne Flammfühler. DIP3 off: Standard setting. Must not be changed. DIP4 on: Dosing softener liquid for devices from 1000 l/h onwards DIP4 off: Dosing softener liquid for devices up to 1000 l/h Note Settings upon delivery in the replacement. DIP 1 to 3: Off DIP 4: On Dosing RM 110/111 via RFID. Adjust the settings after installation accordingly. 16 English 5.906-432.0 Rev. 00 (06/15)

1 Encoding pin 2 Recess for encoding pin Plug coding The plugs for the PCB connections are designed with encoding pins and their matching recesses in the PCB base so that only the matching plug can be attached to the respective connection. 5.4.5 Control panel with display indication (HDS 13/20 only) 1 Display 2 Programme switch position "Cold water operation" 3 Programme switch position "ECO mode*" 4 Programme switch position "Hot water / steam operation" 5 Programme switch 6 Setting, water temperature 7 Dosage valve for detergent Note In the "ECO mode the water temperature is maintained at 60? (+/- 9). Set water temperatures < 60 C are effective, settings <60? remain without any effect. 8 Dosing range detergent tank 1 9 Dosing range detergent tank 2 10 Programme switch position "Off" 11 Manometer 12 Filling level detergent tank 2 13 Filling level detergent tank 1 14 Filling level fuel English 5.906-432.0 Rev. 00 (06/15) 17

6 Function 6.1 Operating displays Note Operating and maintenance displays are shown one after the other like in a slide show. Each picture for 3 seconds. The fault displays remain until the device is switched off. Display Explanation Remark Upper bar: Level fuel (8 stages) Centre bar: Level detergent 1 (4 stages) Lower bar: Level detergent 2 (4 stages) In case of a cable break the relevant bar is not displayed. Maintenance for pump due after 600 h. Perform maintenance procedure. Reset pump hours. Maintenance for burner due after 400 h. Perform maintenance procedure. Reset burner hours. Maintenance for accessory due after 80000 gun switching operations. Perform maintenance procedure. Reset gun switching operations. 6.2 Maintenance operating fluids Display Explanation Remark Empty liquid softener. Insert new bottle. The bottle of the liquid softener is missing or the 5 hours afterrunning time have elapsed. The burner is locked. Insert new bottle. Oil refill container HP pump is empty. Replenish oil. 18 English 5.906-432.0 Rev. 00 (06/15)

6.3 Setting liquid softener Display Explanation Remark Set liquid softener dosing in accordance with the water hardness. This display appears for 3s if the liquid softener setting is changed. Attention service mode position. After the restart, the device will be in the service mode. This display remains until another liquid softener setting is selected. 6.4 SB mode Display Explanation Remark Insertion of money required. Only with operation with SB board. English 5.906-432.0 Rev. 00 (06/15) 19

6.5 Storage compartments 1 Cover, upper storage compartment 2 Storage operating instructions 3 Fastening screws upper storage compartment (4x) 4 Storage compartment top 5 Nameplate 6 Fastening screw control panel 7 Operator console 8 Storage replacement nozzles 9 Storage dirt grinder 10 Storage compartment bottom 11 Bottle holder for round liquid softener bottle or detergent bottle 12 Recessed grip 13 Bottle holder for two RFID liquid softener bottles 20 English 5.906-432.0 Rev. 00 (06/15)

6.6 Cover Note Open cover and dismantle if necessary 1 Screwdriver 2 Storage compartment top 3 Lock of appliance hood 4 Cover Push in the locking mechanism of the cover and turn it by 90. Open the appliance hood. 1 Locating lug arrestor cable 2 Arrestor cable cover Unhook the arrestor cable from the locating lug. 1 Hinge cover (2x) Unclip hinges. Remove the appliance cover. English 5.906-432.0 Rev. 00 (06/15) 21

6.7 View from the right, cover removed 1 Fuel line to the booster heater 2 Electric box, motor 3 Burner blower 4 Oil refill container pump 5 Motor 6 Handle, pressure and volume regulation 7 Pump head 8 Oil drain screw 9 Chassis 10 Plug detergent tank 2 11 Water hose to the pump 12 Casing water fine filter 13 SDS hose to the safety block 14 Splashboard, safety valve 15 Safety valve 16 Water shortage safeguard 17 Continuous heater 18 Service switch and setting liquid softener 19 Exhaust nozzle, on-demand heater 20 Burner, booster heater 21 Locking block cover 22 Cover, storage compartment top 22 English 5.906-432.0 Rev. 00 (06/15)

6.7.1 Revised device design (with filter before the pump and electronic ignition transformer) 1 Fuel line to the booster heater 2 Electric box, motor 3 Burner blower 4 Oil refill container pump 5 Motor 6 Handle, pressure and volume regulation 7 Pump head 8 Plug detergent tank 2 9 Filter 10 SDS hose to the safety block 11 Splashboard, safety valve 12 Safety valve 13 Water shortage safeguard 14 Continuous heater 15 Service switch and setting liquid softener 16 Burner, booster heater 17 Locking block cover 18 Cover, storage compartment top English 5.906-432.0 Rev. 00 (06/15) 23

6.8 Service switch 1 Position marking 2 Service switch Setting the water hardness The setting of the liquid softener dosing is done in accordance with the local water hardness (ask your local water supply company or determine by means of a hardness tester). Hardness tester 6.768-004.0 Water hardness Adjustments dh very soft OFF position up to 3.0 soft Position 1 3,1-7,0 medium Position 2 7,1-14,0 hard Position 3 14,0-21,0 very hard Position 4 > 21,0 Note When using RM 111, do not fall below position 3. Observe setting DIP 4 on the printed circuit board. Service position In the "Service" position the settings of the device can be edited by means of the service switch and the control panel. From the "Service" position, the service switch can be turned a little further to the "SET" position. From this position, the switch returns to the "Service" position after releasing it. The "SET" position merely fulfils a pushbutton function. Note The setting options are described in Chapter 7.4 or 7.24 "Service functions with LED display". 24 English 5.906-432.0 Rev. 00 (06/15)

6.9 Fuel tank 1 Closure fuel tank 2 Seal fuel tank closure 3 Filler neck 1 Fuel filter 2 Level sensor for fuel tank 3 Fuel tank 1 Level sensor for fuel tank English 5.906-432.0 Rev. 00 (06/15) 25

6.10 Liquid softener 6.10.1 Feed via tank (export variant) The feed of the liquid softener takes place in accordance with the setting on the service switch. The setting is described under 6.8 "Service switch". The feed only takes place in the programme switch position "ECO" and "Warm water" at a set water temperature 50 C. Bottle counter is increased by 1 after 2000 impulses. The empty message takes place via the level sensor and is shown via an indicator lamp or display. The burner operation is also possible without liquid softener. With hard water, however, malfunctions due to lime deposits must be expected. Note The dosing unit must not be switched off when using RM 111. 1 Lock 2 Washer 3 Liquid softener reservoir 1 Liquid softener reservoir 2 Level sensor 26 English 5.906-432.0 Rev. 00 (06/15)

1 Liquid softener reservoir 2 Level sensor 3 Dosing valve 6.10.2 Feed via RFID (Europe variant) The feed of the liquid softener takes place in accordance with the setting on the service switch. The setting is described under 6.8 "Service switch". The feed only takes place in the programme switch position "ECO" and "Warm water" at a set water temperature 50 C. Bottle counter is increased by 1 after 2000 impulses. The empty message takes place via the level sensor in the liquid softener tank or via the write-read electronics in combination with the tag on the bottle. The liquid softener bottle must be inserted within 5 operating hours, otherwise the burner switches off for the protection against calcification and a corresponding malfunction appears. The burner operation is only enabled again by inserting a new original liquid softener bottle. A bottle that has already been empty but refilled will not be accepted. The bottle works with an internal vacuum. If the bottle is damaged or a hole is drilled into the bottle, it will drain within a short period of time. During burner operation with hard water without liquid softener malfunctions due to lime deposits must be expected. Note The dosing unit must not be switched off when using RM 111. RM 111 was specially developed for the protection against black water. In order that the corrosion protection works optimally, it is also added in cold water operation. RFID recognises RM 111 over the day on the bottle and doses accordingly. English 5.906-432.0 Rev. 00 (06/15) 27

1 Liquid softener bottle 2 Screws 3 RFID - attachment 1 RFID - attachment 2 Bottle opener - insertion 1 Liquid softener bottle 2 Sealing Note The sealing is pierced upon inserting the bottle. 28 English 5.906-432.0 Rev. 00 (06/15)

6.10.3 Functionality RFID RFID (Radio Frequency Identification) stands for the identification by means of high frequency. There is a transponder under the label on the softener bottle (microchip with antenna, also called tag). The write-read electronics installed in the RFID attachment can read data from the tag and also write data to the tag. The tag obtains the power supply from the high frequency field of the write-read electronics. The data transfer takes place by changes of the field intensity. The write/read electronics query the type of detergent and saves the dosed units to the tag. When the bottle is empty (after 2000 units) or when the level switch in the softener container reports empty, an afterrunning time of 5 hours is started. This after-running time is counted on the tag. When the after-running time has elapsed or if the empty bottle is removed, the burner is switched off. Once a bottle has been detected to be empty, it is blocked electronically and can no longer be used. Therefore, you must insert a new original softener bottle. 1 RFID - attachment 2 Write-read electronics 1 Antenna 2 Write-read electronics English 5.906-432.0 Rev. 00 (06/15) 29

1 Label 2 RFID tag, behind the label Note Tag is an electronic component on the new square softener bottle. The tag is located behind the bottle label. The tag can be read and written on electronically. 6.11 Swimmer tank Float tank The float container is integrated in the chassis. It is located on the right, under the liquid softener reservoir. The swimmer reservoir supplies the pump evenly with water. It is also used to separate the water inlet and the pump and prevents detergent from entering the water supply line in case of damage. Swimmer valve Water flows into the float container through the opened float valve. When the water level is rising, the float ball rises and closes the float valve. The float valve is adjusted permanently and must not be readjusted. 1 Water inlet 2 Swimmer valve 3 Swimmer ball 4 Float tank 30 English 5.906-432.0 Rev. 00 (06/15)

6.12 Detergent Tank 6.12.1 Detergent tank 1 Detergent tank 1 (volume 10l) The detergent tank 1 is located in the rear part of the chassis. Suction hose The plug with the connection of the suction hose is located between the booster heater and the lower storage compartment or the hose reel. Level sensor (option) The level sensor contains a reed switch that is operated by means of a magnet in the float. 1 Detergent tank 1 2 Lock 1 Stopper English 5.906-432.0 Rev. 00 (06/15) 31

1 Level sensor (option) 6.12.2 Detergent tank 2 Detergent tank 2 (volume 20l) The detergent tank 2 is located in the right part of the chassis. Suction hose The plug with the connection of the suction hose is located above the right transport wheel. A detergent filter is attached at the end of the suction hose Level sensor The level sensor contains a reed switch that is operated by means of a magnet in the float. 1 Detergent tank 2 2 Lock 32 English 5.906-432.0 Rev. 00 (06/15)

1 Stopper 2 Cleaning agent filter 3 Detergent tank 2 1 Level sensor (option) 2 Stopper 3 Detergent tank 2 4 Float 6.13 Detergent dosing valve Detergent dosing valve with automatic clear rinsing in zero position 1 Water 2 Detergent tank 1 3 Detergent tank 2 4 Pump English 5.906-432.0 Rev. 00 (06/15) 33

6.14 Motor (air-cooled) 1 Electronics system 2 Burner blower 3 Fuel pump 4 Solenoid valve 5 Blower, motor cooling 6 Engine mount, left 7 Engine mount, right 8 Pump head 9 Oil level sensor 10 Oil fill container 11 Handle, pressure and volume regulation 12 Cover 1 Cover 2 Oil level sensor 3 Oil fill container Oil drain screw The oil drain screw is located on the bottom of the pump casing. 34 English 5.906-432.0 Rev. 00 (06/15)

6.14.1 Motor (air-cooled) 1 Connecting cable, motor 2 Fan wheel 3 Stator 4 Motor bearing, rear (B bearing) 5 Motor shaft 6 Rotor 7 Casing 8 Shaft seal ring 9 Motor bearing, front (A bearing) 10 Swash plate with axial ball bearing 11 Screw 12 Oil drain screw 13 Detergent suck in 14 Suction side 15 Suction valve 16 Piston 17 High pressure seal 18 Low pressure seal 19 Oil seal 20 Piston spring 21 Retaining plate for piston spring 22 Pressure valve 23 Valve screw 24 Oil level sensor 25 Oil fill container 1 Bushing 2 Washer, plastic 3 High pressure seal 4 Low pressure seal 5 Washer, brass English 5.906-432.0 Rev. 00 (06/15) 35

6.15 Electrical box, air-cooled motor 1 Ground point 2 Terminal strip 3 Connection to earth, motor 4 Engine contactor K1 5 Anti-interference filter 6 Board, motor distributor 7 Connection pressure switch ON 8 Connection pressure switch OFF 9 Oil level sensor connection 10 Connection of coiling protection contact 11 Connection printed circuit board, operating panel 12 Connection fuel solenoid valve 13 Connection motor protection 14 Connection is not used 15 Cable comb 36 English 5.906-432.0 Rev. 00 (06/15)

6.16 Engine (water-cooled) 1 Electronics system 2 Burner blower 3 Cooling coil 4 Fuel pump 5 Solenoid valve 6 Engine mount, left 7 Engine mount, right 8 Pump head 9 Oil level sensor 10 Oil fill container 11 Handle, pressure and volume regulation 12 Cover Oil drain screw The oil drain screw is located on the bottom of the pump casing. 1 Cover 2 Oil level sensor 3 Oil fill container English 5.906-432.0 Rev. 00 (06/15) 37

6.16.1 Engine (water-cooled) 1 Connecting cable, motor 2 Cooling coil 3 Stator 4 Motor bearing, rear (B bearing) 5 Motor shaft 6 Rotor 7 Casing 8 Shaft seal ring 9 Motor bearing, front (A bearing) 10 Screw 11 Swash plate 12 Slide shoe 13 Oil drain screw 14 Detergent suck in 15 Suction side 16 Suction valve (green with HDS 13/20) 17 Piston 18 High pressure seal 19 Low pressure seal 20 Oil seal 21 Piston spring 22 Retaining plate for piston spring 23 Pressure valve 24 Valve screw 25 Oil level sensor 26 Oil fill container 1 Bushing 2 High pressure seal 3 Low pressure seal 4 Washer, plastic 5 Washer, brass 38 English 5.906-432.0 Rev. 00 (06/15)

6.16.2 Electrical box, water-cooled engine 1 Ground point 2 Connection to earth, motor 3 Engine contactor 4 Anti-interference filter 5 Board motor distributor 6 Connection pressure switch ON 7 Connection pressure switch OFF 8 Oil level sensor connection 9 Connection printed circuit board, operating panel 10 Connection of coiling protection contact 11 Connection fuel solenoid valve 12 Connection motor protection 13 Connection is not used 14 Cable comb English 5.906-432.0 Rev. 00 (06/15) 39

6.17 Pump 1 Handle, pressure and volume regulation 2 Screwed sealing plug 3 Screws pump head 4 Pump head 5 Suction jumper 6 Screwed sealing plug 7 Water pipes 8 Safety bracket, pressure switch OFF 9 Pressure switch OFF 10 SDS hose to the safety block 11 Pressure switch ON 12 Safety bracket, pressure switch ON 40 English 5.906-432.0 Rev. 00 (06/15)

6.17.1 Revised version with filter before the pump 1 Handle, pressure and volume regulation 2 Screwed sealing plug 3 Screws pump head 4 Pump head 5 Suction jumper 6 Screwed sealing plug 7 Filter 8 Safety bracket, pressure switch OFF 9 Pressure switch OFF 10 SDS hose to the safety block 11 Pressure switch ON 12 Safety bracket, pressure switch ON English 5.906-432.0 Rev. 00 (06/15) 41

6.18 Safety block 1 Connecting cable, reed switch 2 Screwed sealing plug 3 Clamping bracket 4 Reed switch 5 High pressure pipe to the on-demand heater 6 Connection hose pressure gauge 7 Safety block 8 SDS hose 9 Adjustment screw, safety valve 10 Valve ball 1 Connection hose pressure gauge 2 Valve ball 3 Safety valve 4 Safety block 5 Sieve 6 SDS hose 42 English 5.906-432.0 Rev. 00 (06/15)

6.19 Safety block (water shortage safeguard old) 1 Connecting cable, reed switch 2 Screwed sealing plug 3 Spring 4 Clamping bracket 5 Reed switch 6 Magnetic piston 7 Holes 8 Water inlet, from the high pressure pump 9 High pressure pipe to the on-demand heater 10 Mould part 11 Water outlet 12 Adjusting screw 13 Spring, safety valve 14 Casing 15 Spring plate 16 Valve ball 17 Valve seat English 5.906-432.0 Rev. 00 (06/15) 43

6.19.1 Water shortage safeguard as cartridge Note The cartridge replaces the previous design with piston and spring. 6.19.2 Safety block (water shortage safeguard new) Note Recommended installation direction: The lower drilled hole of the cartridge points towards the high-pressure pipe to the booster heater. 44 English 5.906-432.0 Rev. 00 (06/15)

6.19.3 Function water shortage safeguard and dry-run protection The lack of water fuse prevents the burner from switching on in case of missing or insufficient water volume and thus protects the on-demand heater from overheating. With an opened gun and a sufficient water flow the solenoid is lifted against the force of gravity in the cartridge. The solenoid piston closes the contact of the reed switch. This opens the fuel solenoid valve and the burner ignites. The sieve in the water supply of the safety block prevents the contamination of the lack of water fuse. The lack of water fuse is a safety component and therefore its locking screw is sealed. The information regarding insufficient water volumes is sent directly to the control PCB. There, this message is evaluated as lack of water fuse (shut-off of burner, see above) and as Dry-run protection for the pump (switch-off device). The lack of water fuse functions immediately. It switches the burner off immediately in case of insufficient water volume and back on after the water level has been replenished. The dry run protection is intitiated when the lack of water fuse signals insufficient water volume for 2 minutes. The appliance shuts off with a fault message and locks up. Only by switching the device off and back on via the main switch, it can be taken into operation again. As the dry-run protection damages the pump in the long run, there must always be a sufficient water supply. 6.19.4 Function of safety valve The safety valve guides the entire flow rate of the pump to the float container if the pressure switch or the overflow valve is defective and thus protects the device and accessories from inadmissibly high overpressure. If the gun is open, the safety valve is closed and the entire flow volume of the pump is transferred to the gun at operating pressure. If the pressure in the high pressure system rises by approx. 20 bar above the permissible operating pressure, the valve ball is lifted off the valve seat and part of the flow volume flows into the swimmer reservoir. The opening pressure of the safety valve is adjusted with the adjustment screw. Rotation to the right increases the opening pressure, rotation to the left decreases the opening pressure. The safety valve is a safety component and therefore its adjustment screw is sealed. Note The safety valve is adjusted via the pressure increase in the system with the burner turned on, so that it limits the pressure increase to the max. permissible value (see Specifciations) with the gun closed. Then seal the settings. English 5.906-432.0 Rev. 00 (06/15) 45

6.20 Burner blower with fuel pump 1 Return 2 Pressure line 3 Screw 4 Blower lid 5 Fuel line 6 Setting fuel pressure 7 Fuel pump 8 Continuous heater 9 Connecting cable solenoid valve 10 Suction opening, burner blower 11 Solenoid valve for fuel 12 Fastening screw fuel pump 13 Blower lid 46 English 5.906-432.0 Rev. 00 (06/15)

1 Rubber collar 2 Lock 3 Air door, air volume adjustment 4 Stop screw 5 Burner blower 1 Solenoid valve 2 Coupling unit 3 Connection pressure line 4 Setting fuel pressure 5 Fuel pump 6 Fastening screw Uninstall fuel pump Detach pressure line. Unscrew locking screws. Remove the fuel pump. Fuel pump The fuel pump is connected directly to the motor shaft via the coupling piece and the blower wheel. It also feeds fuel from the tank and back via the return during cold water operation. This lubricates the toothed wheel pump. During warm water operation, the installed solenoid valve and part of the fuel reaches the burner through the fuel nozzle and is ignited there. The fuel pressure is adjusted via the central setting screw. During dry runs, the fuel pump will block. The coupling piece serves as a nominal breaking point. 1 Fastening screws blower cover 2 Fastening screw blower wheel 3 Coupling unit 4 Blower wheel 5 Fuel pump Burner blower The blower supplies the burner with combustion air. The air flap is used to adjust the air value to optimised combustion values. The blower wheel is mounted to the motor shaft by means of 2 feather keys. English 5.906-432.0 Rev. 00 (06/15) 47

6.21 Booster heater (with ignition transformer) 1 Capillary exhaust temperature monitor 2 Protective conductor 3 Cover 4 Screws burner 5 Locking screw for appliance hood 6 Sight glass, ignition monitoring (option) 7 Burner 8 Ignition cable 9 Connection cable ignition transformer 10 Ignition transformer 11 Screw burner cover 12 Fuel line 13 Heating coil with type plate 14 Exhaust temperature sensor 15 Exhaust nozzle 48 English 5.906-432.0 Rev. 00 (06/15)

6.22 Booster heater (with ignition transformer new) 1 Electronic ignition transformer 2 Fastening screw of ignition transformer 3 Screws for burner cover (3 x) 4 Sight glass, ignition monitoring (option) 5 Burner cover 6 Fuel line 6.22.1 Type plate of heating coil The type plate of the heating coil can be read through the exhaust stack. 7 Exhaust nozzle, on-demand heater 8 Type plate of heating coil 9 Exhaust temperature sensor 10 Connection for air pressure measurement 11 Capillary exhaust temperature monitor 12 Protective conductor 1 Year of manufacture 2 Specifications 3 Part number of heating coil 4 Pressure test passed 5 Continuous plant number English 5.906-432.0 Rev. 00 (06/15) 49

6.22.2 Ignition transformer Various ignition transformers are installed in the devices. Electronic ignition transformer The integrated electronic ignition transformer (see picture above) is meanwhile used for all devices, except the devices for special voltages. The electronic ignition transformer is installed directly on the burner and secured with a screw that is accessible from the top. Ignition cables are not required. Ignition transformer of conventional type with ignition cable 6.22.3 Flame sensor with holder on the burner With older devices or devices for special voltages the conventional ignition transformers are still used. 1 Looking glass 2 Light sensor 3 Flame sensor 1 Screw 2 Holder flame sensor 3 Flame sensor 4 Marking 5 Lock 50 English 5.906-432.0 Rev. 00 (06/15)

6.22.4 Sectional view booster heater 1 12 2 3 4 5 11 10 9 8 6 1 Ignition electrodes 2 Fuel nozzle 3 Pressure plate 4 Flame ring 5 Burning chamber 6 Boiler floor 7 Boiler input 8 Air supply from burner blower 9 Boiler exterior, double-walled 10 Heating coil spiral, exterior 11 Heating coil spiral, interior 12 Exhaust nozzle, on-demand heater 7 English 5.906-432.0 Rev. 00 (06/15) 51

Mode of operation The water from the high pressure pump enters the interior heating coil spiral, is heated while flowing through and exits to the bottom from the heating coil spiral. The fuel is vaporised by the fuel nozzle and ignited by the spark of the ignition electrodes. The combustion air from the blower first flows through the double-walled boiler exterior toward the top, then it flows downward with the flame and is emitted as exhaust through the exhaust stack toward the top into the atmosphere. The boiler floor is made of fire-resistant insulating concrete. It prevents a radiation of the heat and is used to reroute the flames. The adjustment of the burner to good exhaust values is achieved via the air flap on the blower (air volume) and with the adjustment screw on the fuel pump (fuel pressure). The temperature increase with the full water volume is 60-65 K independent of the device. If the water volume is reduced via the pressure and volume control, the water can be heated to approx. 100 C; if you use the steam nozzle, up to 155 C. An optimal burner performance is only possible if the heating coil is neither full of soot nor other deposits. Furthermore, the spark electrodes, the amount of fuel and the amount of air must be adjusted properly. Steam operation The following preparations must be made for steam operation: Install steam nozzle Set the operating pressure on the pressure and volume control on the pump to the lowest value Set the desired steam temperature at the operating panel Note As per pressure device guidelines, the operating pressure inside the appliance must be less than 32 bars for steam operation. This is ensured by reducing the operating pressure on the pressure and volume control and by using the supplied steam nozzle. 52 English 5.906-432.0 Rev. 00 (06/15)

6.23 Burner 1 Looking glass 2 Connection pressure line 3 Connection ignition electrode 4 Connection for air pressure measurement 5 Burner cover 1 Ignition electrode 2 Fuel nozzle 3 Pressure plate 1 Ignition electrode 2 Fuel nozzle English 5.906-432.0 Rev. 00 (06/15) 53

6.24 Burner 1 Ignition electrodes 2 Fuel nozzle holder 3 Fuel nozzle 4 Spray angle 45 or 60, depending on the type of appliance 5 Screw 6 Burner cover Burner There is a strong spark created between the two ignition electrodes to ensure that the injected fuel will ignite. The necessary ignition voltage is generated by the ignition transformer. The exact adherence to the adjustment dimensions is a basic requirement for the proper function of the burner, for good exhaust values and the long idle time of the ignition electrodes. There is always a ignition spark between the two ignition electrodes, during cold and hot water operation (continuous ignition). This is a safety measure, so that injected fuel will be ignited in any case and cannot accumulate unburned in the on-demand heater (deflagration hazard). 54 English 5.906-432.0 Rev. 00 (06/15)

6.25 Output, booster heater 1 Floor plate 2 Output of flow-type heater 3 Temperature sensor water 4 Clamping bracket 5 Chassis 6 Connecting cable temperature sensor 7 Input of flow-type heater 8 Bottom booster heater 9 Pressure line of the safety block English 5.906-432.0 Rev. 00 (06/15) 55

6.26 Hand spraygun 1 Lock trigger gun 2 Casing shell 3 Hand lever 4 High pressure hose 5 Hose guide 6 Safety clip 7 Needle bearing 8 Coupling high-pressure hose/trigger gun 9 O ring 10 Node piece Function When the manual lever is actuated, the valve in the node piece opens and the water can flow from the hose through the gun into the spray lance. Note The node piece cannot be repaired and must be replaced as a complete unit. The date of manufacture is imprinted on the node piece. It is composed of the month (letters A to L for January through December) and year (1-digit number 1 for 2011, 2 for 2012, etc.). Example: H1 = August 2011 56 English 5.906-432.0 Rev. 00 (06/15)

6.27 Pressure and volume regulation 1 Connection trigger gun 2 Connecting pin 3 Ceramic disc on gun side 4 Ceramic disc on spray pipe side 5 Casing of rotating regulator 6 Handle of rotary regulator 7 Spray lance connection The pressure and volume regulation is designed as a rotary regulator between the trigger gun and the spray lance. There are two ceramic discs within the high pressure channel. A ceramic disc is rigidly connected with the connection of the trigger gun. The other ceramic disc is connected to the rotating regulator and therefore adjustable. Offset holes in the ceramic discs can adjust the flow volume and the pressure when rotating the discs. This illustration shows the two overlapping ceramic discs and the water flow (blue) with different opening angles (from 0 to 90 ). With the minimal setting, the water flows through a small hose in the middle of the ceramic discs. Note The rotary regulator cannot be repaired and must be replaced as a complete unit. Water flow with opening angle 0-90 English 5.906-432.0 Rev. 00 (06/15) 57

6.28 Functional diagram of pressure water operation (water-cooled motor) 58 English 5.906-432.0 Rev. 00 (06/15)

1 Detergent tank 1, volume 10 l 2 Detergent suction hose with filter 3 Level sensor, detergent tank 1 (option) 4 Detergent suction hose with filter 5 Level sensor, detergent tank 2 (option) 6 Detergent tank 2, volume 20 l 7 Dosage valve for detergent 8 Suction hose for detergent 9 Detergent check valve 10 Pressure switch ON 11 Pressure and volume regulation 12 Oil tank 13 Water connection 14 Water supply hose 15 Fuel filter 16 Fuel tank 17 Level sensor for fuel tank 18 Fuel suction hose 19 Fuel return line 20 Fuel pump 21 Solenoid valve, fuel pump 22 Continuous heater 23 Fuel pressure line 24 Ignition electrodes 25 Fuel nozzle 26 Exhaust nozzle 27 Exhaust temperature sensor 28 Setting, water temperature 29 Printed circuit board (PCB) 30 Temperature sensor 31 Heating coil 32 Air flap 33 Water fine filter 34 Burner blower 35 Motor casing with cooling coil 36 Pressure switch OFF 37 Safety block with water shortage safeguard and safety valve 38 Manometer 39 Pressure pipe 40 Solenoid valve liquid softener 41 Level sensor liquid softener 42 Liquid softener reservoir 43 Swimmer valve 44 Float tank 45 High pressure nozzle 46 Spray lance 47 Trigger gun 48 High pressure hose 49 Rotary regulator for pressure and quantity regulation 50 Rinse line English 5.906-432.0 Rev. 00 (06/15) 59

6.29 Functional diagram vacuuming operation 60 English 5.906-432.0 Rev. 00 (06/15)

1 Detergent tank 1 2 Detergent suction hose with filter 3 Level sensor, detergent tank 1 4 Detergent suction hose with filter 5 Level sensor, detergent tank 2 6 Detergent tank 2 7 Suction hose with filter and check valve 8 Open container 9 Dosage valve for detergent 10 Suction hose for detergent 11 Detergent check valve 12 Pressure switch ON 13 Pressure and volume regulation 14 Oil tank 15 Fuel filter 16 Fuel tank 17 Level sensor for fuel tank 18 Fuel suction hose 19 Fuel return line 20 Fuel pump 21 Solenoid valve, fuel pump 22 Continuous heater 23 Fuel pressure line 24 Ignition electrodes 25 Fuel nozzle 26 Exhaust nozzle 27 Exhaust temperature sensor 28 Setting, water temperature 29 Printed circuit board (PCB) 30 Temperature sensor 31 Heating coil 32 Air flap 33 Water fine filter 34 Burner blower 35 Motor casing with cooling coil 36 Pressure switch OFF 37 Safety block with water shortage safeguard and safety valve 38 Manometer 39 Pressure pipe 40 Solenoid valve liquid softener 41 Level sensor liquid softener 42 Liquid softener reservoir 43 Swimmer valve 44 Float tank 45 High pressure nozzle 46 Spray lance 47 Trigger gun 48 High pressure hose 49 Rotary regulator for pressure and quantity regulation 50 Rinse line 51 Slot (plug) vacuuming operations 52 Hose to the fine filter 53 Hose from the motor cooling to the pump Note During vacuuming operations, the float container must be bypassed. English 5.906-432.0 Rev. 00 (06/15) 61

6.30 Vacuuming operations Note If the appliance is used for vacuuming, the rinse hose of the detergent dosing valve must be plugged onto the respective plug to prevent erroneous air suction. Furthermore, the fine filter must be uninstalled and the water supply hose must be connected directly to the high pressure pump. 1 Slot vacuum operation (plug) 2 Slot pressure water operation (connection) Note The conversion to vacuuming operations requires bypassing of the float container. Remove the liquid softener bottle and turn it over immediately to avoid spills. Open the device hood. Unscrew the water filter from the high-pressure pump inlet. Unscrew the water hose from the float valve and screw it onto the high-pressure pump inlet. Pull the rinse hose off the connection on the float container output and plug it onto the stopper. CAUTION When replacing the liquid softener reservoir, make sure that the cables from the solenoid valve and level sensor are not crushed. Place the liquid softener tank onto the swimmer reservoir. Until the pump has sucked in water Set the pressure/quantity regulation at the pump unit to maximum quantity. Close the dosing valve for the detergent. Note The suction hose with filter (accessory) must have a minimum diameter of 3/4". The suction height is max. 0.5 m. 62 English 5.906-432.0 Rev. 00 (06/15)

6.31 Pressure and volume regulation 1 Threaded pin, max. pressure setting 2 Locknut threaded pin 3 Semiload spindle 4 Half-load stop sleeve 5 Pressure spring 6 Overflow piston 7 High pressure valve (3x) 8 Pump piston (3x) 9 Suction valve (3x) 10 Detergent infeed with backflow valve 11 Suction jumper with water connection 12 Sleeve with throttle bore 13 Pressure switch "OFF" 14 Valve seat 15 Pressure holding valve 16 Pressure switch "ON" 17 Locknut of semiload stop sleeve English 5.906-432.0 Rev. 00 (06/15) 63

6.31.1 Function pressure and volume regulation Manually with a pressure regulator on the high pressure pump The pressure and volume regulation via the handle on the high pressure pump is used to relieve the motor with mostly partial load operation. Turning the spindle anticlockwise lowers the pretension of the pressure spring. This will lift the overflow piston with a lower pressure from the valve seat and part of the flowing volume runs to the suction chamber via the sleeve with the throttle bore. The pump runs at reduced pressure. Depending on the spindle setting, the pressure and the water volume change. With the rotary regulator on the gun The pressure and volume regulation via the rotary regulator on the gun should only be used during occasional partial load operation. When the pressure is reduced via the rotary regulator, the manual pressure and volume regulation on the pump must always be opened all the way (direction "+" on the handle); otherwise, the appliance will shut off prematurely. If the rotary regulator is partially closed, the pressure in the system will increase. This will lift the piston off the valve seat so that a part of the flowing volume flows back to the suction chamber via the return. The pump continues to run at high pressure. Depending on the setting of the rotary regulator on the gun, the pressure and the water volume change. Gun closed If the gun is closed completely, the piston will open all the way and the entire flow volume of the pump flows to the suction chamber via the throttle bore. The dynamic pressure building up through the throttle bore of the sleeve in the return actuates the pressure switch which will in turn shut off the appliance. 64 English 5.906-432.0 Rev. 00 (06/15)

6.32 Functional description of pressure switch 6.32.1 Appliance is switched off 1 2 3 4 5 6 11 7 8 9 10 0 Volt 1 High pressure outlet (without pressure) 2 Manometer (without pressure) 3 Pressure retaining valve (closed) 4 Pump stands still 5 Rotary knob 6 Overflow valve (closed) 7 Reduction bore 8 Pressure switch "OFF" (closed) 9 Water inlet 10 Motor contactors (K1) (open) 11 Pressure switch "ON" (closed) When the appliance is switched off and the gun is open, the pressure is taken from the system and it is without voltage. Both pressure switches as well as the overflow valve and the pressure retaining valve closed. The motor contactors are open. Note The shown functions of the preessure switches and motor contactor are for understanding purposes only. In reality, the information from the two pressure switches is transferred directly to the control electronics, which in turn controls the motor contactor. English 5.906-432.0 Rev. 00 (06/15) 65

6.32.2 The appliance is switched on and the gun is open 1 2 3 4 5 6 11 7 8 9 10 24 Volt 1 High pressure outlet, working pressure 2 Manometer, working pressure 3 Pressure retaining valve (open) 4 Pump is running 5 Rotary knob 6 Overflow valve (closed) 7 Reduction bore 8 Pressure switch "OFF" (closed) 9 Water inlet 10 Motor contactors (K1) (closed) 11 Pressure switch "ON" (open) After switching on the appliance and with the gun open, the contactor will be actuated and closes the contacts. This will start the motor and the pump will build up the working pressure. Open the pressure retaining valve and the pressure switch "ON", the overflow valve and the pressure switch "OFF" remain closed. Due to the closed pressure swtich, the motor contactors also remain closed. Note The shown functions of the preessure switches and motor contactor are for understanding purposes only. In reality, the information from the two pressure switches is transferred directly to the control electronics, which in turn controls the motor contactor. 66 English 5.906-432.0 Rev. 00 (06/15)

6.32.3 Gun is closed 1 2 3 4 5 6 11 7 8 9 10 24 Volt 1 High pressure outlet, shut-off pressure 2 Manometer, shut-off pressure 3 Pressure retaining valve (closed) 4 Pump stands still 5 Rotary knob 6 Overflow valve 7 Reduction bore 8 Pressure switch "OFF" (open) 9 Water inlet 10 Motor contactors (K1) (open) 11 Pressure switch "ON" (open) Note The shown functions of the preessure switches and motor contactor are for understanding purposes only. In reality, the information from the two pressure switches is transferred directly to the control electronics, which in turn controls the motor contactor. As soon as the overflow valve opens, the pressure retaining valve closes and the shut-off pressure is locked between the gun and the pressure retaining valve. Due to the locked in switch-off pressure, the pressure switch "ON" remains open. There will be a pressure backup in front of the reduction bore, which opens the pressure switch "OFF" at about 10 bar and thus interrupts the control circuit. The motor contactors open and the motor is shut off. As soon as the motor has stopped, the overflow valve will close and so will the pressure switch "OFF". However, the motor contactors will remain open as the control circuit is still interrupted by the open pressure switches "ON". There will be brief overpressure in the system when the gun is closed. This will open the overflow valve and the entire flow volume streams into the suction chamber of the pump through the throttle bore. English 5.906-432.0 Rev. 00 (06/15) 67

6.32.4 The gun is reopened when the appliance is switched on 1 2 3 4 5 6 11 7 8 9 10 24 Volt 1 High pressure outlet (without pressure) 2 Manometer (without pressure) 3 Pressure retaining valve (closed) 4 Pump is running 5 Rotary knob 6 Overflow valve (closed) 7 Reduction bore 8 Pressure switch "OFF" (closed) 9 Water inlet 10 Motor contactors (K1) (closed) 11 Pressure switch "ON" (closed) The pressure switch "ON" closes, which in turn will close the control circuit. The motor contactor is actuated, closes the contacts, the motor starts up and the pump rebuilds the working pressure. Note The shown functions of the preessure switches and motor contactor are for understanding purposes only. In reality, the information from the two pressure switches is transferred directly to the control electronics, which in turn controls the motor contactor. As soon as the gun is opened, the pressure that is locked in between the pressure retaining valve and the gun escapes. 68 English 5.906-432.0 Rev. 00 (06/15)

7 Basic settings and service procedures 7.1 Remove the hose drum 7.1.1 Uninstall / install high-pressure hose 1 Casing shell, hose reel 2 Screws Release pressure. Unwind the HP hose from the hose reel. Unscrew the screws. Remove the casing shell. 1 Clip Lever out the clamp. Pull out the hose. Take a new hose through the hose guide and the deflection pulley. Slide the hose into the union piece of the hose reel and secure by means of the clamp. English 5.906-432.0 Rev. 00 (06/15) 69

7.1.2 Renew O-rings axle, hose reel 7.1.1Uninstall / install high-pressure hose 1 Screw 2 Casing shell, hose reel Loosen screws. Turn the hose reel. 1 Casing shell, hose reel 2 Screws Unscrew the screws. 1 Screws 2 Bearing block Unscrew the screws. 70 English 5.906-432.0 Rev. 00 (06/15)

1 Casing shell, hose reel 2 Bearing block 3 Crank Remove the front part of the hose reel. 1 Hose drum 2 Safety ring 3 Pipeline with axle 4 Node piece 5 Pliers Remove the retaining ring. Remove the knot. Remove the rear part of the hose reel. 1 Rear bearing block 2 Screws 3 O rings 4 Pipeline with axle Remove O-rings. Installation information Replace the O-rings. Grease the O-rings. Grease 6.288-088.0 Note Check axle and connection piece for signs of wear. English 5.906-432.0 Rev. 00 (06/15) 71

7.1.3 Uninstall / install pipeline with axle 7.1.2Renew O-rings axle, hose reel 1 Rear bearing block 2 Screws 3 O rings 4 Pipeline with axle Note Align the pipeline with axle at a right angle to the rear bearing block. 1 Pipeline with axle 2 Screw connection 3 Wrench Disconnect screw connection. Remove pipeline with axle. 72 English 5.906-432.0 Rev. 00 (06/15)

7.2 Uninstall / install pressure gauge 1 Manometer Unscrew the screws on the control panel. Manually push in the left clip. 1 Manometer 2 Screwdriver Push in the right clip by means of a screwdriver. 1 Screw connection 2 Manometer 3 Clips Remove the pressure gauge. Disconnect screw connection. English 5.906-432.0 Rev. 00 (06/15) 73

7.3 Adjust safety valve 1 Turning handle Screw in the twist grip of the pressure and volume regulation on the pump all the way to the stop (towards "+"). Pull off the rotary handle. 1 Adjusting screw 2 Counter-nut Loosen counter-nut. Completely screw in the adjustment screw. Install the stop valve on the high-pressure connection. Turning on the appliance. 1 Safety block 2 Safety valve 3 Adjustment screw, safety valve Slowly close the stop valve. Observe at what pressure water is tripping. (Nominal value: 20 bar above max. working pressure, see technical data) If the pressure is too high, turn the adjustment screw on the safety valve to the left (relax the pressure spring). If the pressure is too low, turn the adjustment screw on the safety valve to the right (tension the pressure spring). Seal the adjustment screw. Adjust the pressure/ volume regulation. 74 English 5.906-432.0 Rev. 00 (06/15)

7.4 Service functions with LED display 1 Setting, water temperature Service mode If the service switch is in the "Service" position (screwdriver symbol) upon switching on the device, the service mode of the device is activated (pump is not running). Selection of the service functions The available service functions are selected via the water temperature setting. Example: 30 C is equivalent to the function ON30MIN. For some functions the function selection must already be set upon switching on the device and the service switch must be kept in the "SET" position for 2-3 seconds. Example: RFIDONOFF is called up with the setting 45? (40/-- C) + "SET" upon switch-on. 1 Control LED 0, pump (red) 2 Control LED 1, rotation direction (red) 3 Control LED 2, operation (green) 4 Control LED 3, fuel (yellow) 5 Control LED 4, detergent tank 1 (yellow) 6 Control LED 5, motor (red) 7 Control LED 6, burner (red) 8 Control LED 7, service (orange) 9 Control LED 8, liquid softener (yellow) 10 Control LED 9, detergent tank 2 (yellow) Changing the settings The display of the current settings takes place via the 10 indicator LEDs on the control panel. By means of the pushbutton function of the service switch (continue to turn to "SET" position, switch snaps back to the "Service" position) the settings can be changed. The change is also displayed via the control LEDS. 1 Service position 2 Service switch Exiting the service mode Turn off the appliance. Set the service switch to the appropriate water hardness level or "OFF". Turn on the appliance. Note For the device versions with a water temperature of max. 80 C or 60 C, the temperature settings are indicated in parenthesis (80/60 C) English 5.906-432.0 Rev. 00 (06/15) 75

7.5 Set up the switching off process Function Adjustments LED indicator Important 30 C (30/30 C) ON30MIN Behaviour of device after 30 minutes of continuous operation. The setting will be saved. The device switches off after 30 minutes of continuous operation. The device does not switch off after 30 minutes of continuous operation (factory setting). 35 C (34/32 C) OFF30MIN Behaviour of device after 30 minutes of continuous standby operation. The setting will be saved. The device switches off after 30 minutes in the standby mode. The device does not switch off after 30 minutes in the standby mode (factory setting). 7.6 Set up the leakage behaviour Function Adjustments LED indicator Important 40 C (37/34 C) LECKAGEONOFF Behaviour of the device after 10 short startups of the pump (run time of the pump under 2 seconds). The setting will be saved. Device switches off after 10 short startups of the pump (factory setting). The device does not switch off after 10 short startups of the pump. 76 English 5.906-432.0 Rev. 00 (06/15)

7.7 Brightness value of the flame sensor Function Adjustments LED indicator Important 45 C (40/35 C) LDRTEST Display of the brightness value measured by the flame sensor. The value is displayed digit by digit by the LEDs, with every LED standing for a numeric value from 0-9 in accordance with its number. Digit value "0" Digit value "1" Digit value "2" The display is repeated after a pause. Example: A brightness value of 1016 is measured. The LEDs light up in the following order: Digit value "3" Digit value "4" Digit value "5" Digit value "6" Digit value "7" - PAUSE - Digit value "8" Digit value "9" A value above 471 is rated as "dark". A value up to 471 is rated as "bright". English 5.906-432.0 Rev. 00 (06/15) 77

7.8 RFID query Function Adjustments LED indicator Important 45 C + SET (40/-- C + SET ) RFIDONOFF Information to the printed circuit board whether the device is equipped with feed via RFID. Device with RFID Device without RFID Menu access: Select 45 C Switch off device. Hold SET. Turn on the machine. Release SET. Select settings with SET. Check the setting when replacing the printed circuit board. 7.9 Testing the temperature sensor Function Adjustments LED indicator Important 50 C (43/36 C) NTCTEST Display of the water temperature measured by the temperature sensor. The value is shown digit by digit by the LEDs. Digit value "0" Digit value "1" Example: A temperature of 27 C is measured. The LEDs light up in the following order: Digit value "2" Digit value "3" Digit value "4" - PAUSE - Digit value "6"...... Note At a temperature below 0?, "0" is displayed. 78 English 5.906-432.0 Rev. 00 (06/15)

7.10 Testing the water temperature setting and the programme switch Function Adjustments LED indicator Important 55 C (46/38 C) ENCPROGTEST With this function, the programme switch and the controller for the water temperature setting can be tested. Upon switch-on, all 10 LEDs are on. By operating the pushbutton function of the service switch (continue to turn to "SET" position and release) and turning the water temperature setting to 30 C, the test is started. If the water temperature setting is gradually increased, the LED display changes as shown to the right. 30 C (30/30 C) 35 C (34/32 C) 40 C (37/34 C) 45 C (40/35 C) 50 C (43/36 C) 55 C (46/38 C) 60 C (48/40 C) 65 C (50/42 C) 70 C (52/44 C) 75 C (55/45 C) English 5.906-432.0 Rev. 00 (06/15) 79

Function Adjustments LED indicator Important 55 C (46/38 C) 80 C (58/46 C) 85 C (60/48 C) 90 C (63/50 C) 95 C (66/52 C) 100 C (68/54 C) 112 C (70/55 C) 125 C (74/56 C) 140 C (77/58 C) 155 C (80/60 C) The temperature setting must finally be set back to 55? (46/38 C). 80 English 5.906-432.0 Rev. 00 (06/15)

Function Adjustments LED indicator Important 55 C (46/38 C) ENCPROGTEST By operating the pushbutton function of the service switch (continue to turn to "SET" position and release) again, the test for the programme switch is started. The LED display depends on the position of the programme switch now. Programme switch position "cold" Programme switch position "eco" Programme switch position "warm" Note To exit the ENCPROGTEST function, switch off the device. English 5.906-432.0 Rev. 00 (06/15) 81

7.11 Testing the service switch Function Adjustments LED indicator Important 60 C (48/40 C) ENCDGTTEST Service switch setting display. Service switch position "OFF" Service switch position "1" Service switch position "2" Service switch position "3" Service switch position "4" Service switch position "Service" Service switch position "SET" 82 English 5.906-432.0 Rev. 00 (06/15)

7.12 Testing the sensor Function Adjustments LED indicator Important 65 C (50/42 C) INPUTTEST Use this function to display the status of the different sensors. Every LED displays the status of a certain sensor. Therefore, several LEDs can be on at the same time. Example: Lack of oil fuse closed (float up). "ON" pressure switch open (pressure switch actuated) Thermal motor protection switch closed This display means: Low oil sensor open (too little oil). "ON" pressure switch not actuated. Thermal motor protection switch closed. Reed switch "fuel tank" closed (tank not empty). Reed switch "detergent tank 1" open (tank empty). Reed switch "water shortage safeguard" closed. "OFF" pressure switch not actuated. Exhaust gas thermostat open (burner off). Reed switch "liquid softener tank" closed (float up). Reed switch "detergent tank 2" open (float up). Reed switch "fuel tank" closed (float up) Reed switch "detergent tank 1" open (float up) Reed switch "water shortage safeguard" closed (water flow present) "OFF" pressure switch open (pressure switch actuated Exhaust gas thermostat closed Reed switch "liquid softener tank" closed (float up) Reed switch "detergent tank 2" open (float up) English 5.906-432.0 Rev. 00 (06/15) 83

7.13 Error memory Function Adjustments LED indicator Important 70 C (52/44 C) ERRORS This functions serves to read the fault memory. The faults are displayed in 2 steps: 1 LED display of the fault type (see on the right). 2 Display of the pump run time in hours that has passed since the fault had occurred via the numerical values of the LEDs Example: Overvoltage detected on transformer 1. Low voltage detected on transformer 1. Excess current detected. Current asymmetry detected. - PAUSE - Thermal motor protection switch open. Dry running of the pump detected. Explanation: The pump has been running for 14 hours since the fault "Thermal motor protection switch open" occurred. Note By operating the pushbutton function on the service switch you can advance to the next fault. "Sticking" water shortage safeguard detected (closed although the pump is off). "Oil refill container empty" detected. Leakage (10 short startups < 2 seconds each). Exhaust thermostat open. 84 English 5.906-432.0 Rev. 00 (06/15)

Function Adjustments LED indicator Important 70 C (52/44 C) Temperature sensor fault. Short circuit or cable break. Flame sensor recognises no or not enough light. Flame sensor recognises light. RFID write-read electronics defective. End of the fault memory. Instead of the operating hours, the version of the installed software is displayed here. Example: Software version 1.4 Note Every possible fault is saved, indicating how many operating hours ago the relevant fault occurred most recently. Note Delete all faults: 70 C (52/44 C) and hold down "SET" upon switch-on. English 5.906-432.0 Rev. 00 (06/15) 85

7.14 Operating hours Function Adjustments LED indicator Important 75 C (55/45 C) STUNDENPWR Indication of the consumed RM 110/111 bottles. The value is displayed digit by digit by the LEDs, with every LED standing for a numeric value from 0-9 in accordance with its number. Digit value "0" Digit value "1" Digit value "2" The display is repeated after a pause. Example: The device has consumed 42 bottles of RM 110/111. Digit value "3" Digit value "4" Digit value "5" - PAUSE - Digit value "6" Digit value "7" Digit value "8" Digit value "9" 86 English 5.906-432.0 Rev. 00 (06/15)

7.15 Gun switching operations since gun service Function Adjustments LED indicator Important 80 C (58/46 C) SI_PISTOLE Display of the gun switchings since the most recent gun service. The value is displayed digit by digit by the LEDs, with every LED standing for a numeric value from 0-9 in accordance with its number. Digit value "0" Digit value "1" Digit value "2" The display is repeated after a pause. Example: The gun was actuated 430 times since the last gun service. The LEDs light up in the following order: Digit value "3" Digit value "4" Digit value "5" Digit value "6" - PAUSE - Digit value "7" Digit value "8" Digit value "9" English 5.906-432.0 Rev. 00 (06/15) 87

7.16 Gun services Function Adjustments LED indicator Important 85 C (60/48 C) SCTR_PISTOLE Display of gun services. The value is displayed digit by digit by the LEDs, with every LED standing for a numeric value from 0-9 in accordance with its number. Digit value "0" Digit value "1" Digit value "2" The display is repeated after a pause. Example: 11 gun services have been performed since the device was first used. The LEDs light up in the following order: Digit value "3" Digit value "4" Digit value "5" - PAUSE - Digit value "6" Digit value "7" Digit value "8" Digit value "9" 88 English 5.906-432.0 Rev. 00 (06/15)

Function Adjustments LED indicator Important 85 C + SET (60/48 C + SET ) When switching on the device, the gun switching operations since the gun service (SI_PISTOLE) are reset to "0", the service counter gun (SCTR_PISTOLE) is increased by 1 and the fault memory is deleted. English 5.906-432.0 Rev. 00 (06/15) 89

7.17 Gun switches since initial startup Function Adjustments LED indicator Important 90 C (63/50 C) TOTALPISTOLE Display of the gun switchings since device was first started up. The value is displayed digit by digit by the LEDs, with every LED standing for a numeric value from 0-9 in accordance with its number. Digit value "0" Digit value "1" Digit value "2" The display is repeated after a pause. Example: The gun was actuated 9483 times since the device has been put into service. The LEDs light up in the following order: Digit value "3" Digit value "4" Digit value "5" Digit value "6" Digit value "7" Digit value "8" - PAUSE - Digit value "9" 90 English 5.906-432.0 Rev. 00 (06/15)

7.18 Operation duration of the burner since burner service Function Adjustments LED indicator Important 95 C (66/52 C) SI_Brenner Display of the operation duration of the burner in hours since the last burner service. The value is displayed digit by digit by the LEDs, with every LED standing for a numeric value from 0-9 in accordance with its number. Digit value "0" Digit value "1" Digit value "2" The display is repeated after a pause. Example: The burner has been in operation for 47 hours since the last burner service. The LEDs light up in the following order: Digit value "3" Digit value "4" Digit value "5" Digit value "6" - PAUSE - Digit value "7" Digit value "8" Digit value "9" English 5.906-432.0 Rev. 00 (06/15) 91

7.19 Burner service Function Adjustments LED indicator Important 100 C (68/54 C) SCTR_BRENNER Display of the burner service. The value is displayed digit by digit by the LEDs, with every LED standing for a numeric value from 0-9 in accordance with its number. Digit value "0" Digit value "1" Digit value "2" The display is repeated after a pause. Example: 4 burner services have been performed since the device was first used. The LEDs light up in the following order: Digit value "3" Digit value "4" - PAUSE - Digit value "5" Digit value "6" Digit value "7" Digit value "8" Digit value "9" 92 English 5.906-432.0 Rev. 00 (06/15)

Function Adjustments LED indicator Important 100 C + SET (68/54 C + SET ) When switching on the device, the burner operation duration since the burner service (SI_BRENNER) is reset to "0", the service counter burner (SCTR_BRENNER) is increased by 1 and the fault memory is deleted. English 5.906-432.0 Rev. 00 (06/15) 93

7.20 Burner operation since initial startup Function Adjustments LED indicator Important 112 C (70/55 C) TOTALBRENNER Display of the operation duration of the burner in hours since the initial startup of the device. The value is displayed digit by digit by the LEDs, with every LED standing for a numeric value from 0-9 in accordance with its number. Digit value "0" Digit value "1" Digit value "2" The display is repeated after a pause. Example: The burner has been in operation for 32 hours since the initial startup of the device. The LEDs light up in the following order: Digit value "3" Digit value "4" Digit value "5" Digit value "6" - PAUSE - Digit value "7" Digit value "8" Digit value "9" 94 English 5.906-432.0 Rev. 00 (06/15)

7.21 Operating hours of the pump since pump service Function Adjustments LED indicator Important 125 C (74/56 C) SI_PUMPE Display of the operating time of the pump since the last pump service in hours. The value is displayed digit by digit by the LEDs, with every LED standing for a numeric value from 0-9 in accordance with its number. Digit value "0" Digit value "1" Digit value "2" The display is repeated after a pause. Example: The burner has been in operation for 31 hours since the initial startup of the device. The LEDs light up in the following order: Digit value "3" Digit value "4" Digit value "5" Digit value "6" - PAUSE - Digit value "7" Digit value "8" Digit value "9" English 5.906-432.0 Rev. 00 (06/15) 95

7.22 Pump service Function Adjustments LED indicator Important 140 C (77/58 C) SCTR_PUMPE Display of the pump services. The value is displayed digit by digit by the LEDs, with every LED standing for a numeric value from 0-9 in accordance with its number. Digit value "0" Digit value "1" Digit value "2" The display is repeated after a pause. Example: 7 pump services have been performed since the device was first used. The LEDs light up in the following order: Digit value "3" Digit value "4" - PAUSE - Digit value "5" Digit value "6" Digit value "7" Digit value "8" Digit value "9" 96 English 5.906-432.0 Rev. 00 (06/15)

Function Adjustments LED indicator Important 140 C + SET (77/58 C + SET ) When switching on the device, the pump operation duration since the pump service (SI_PUMPE) is reset to "0", the service counter pump (SCTR_PUMPE) is increased by 1 and the fault memory is deleted. English 5.906-432.0 Rev. 00 (06/15) 97

7.23 Pump operation since initial startup Function Adjustments LED indicator Important 155 C (80/60 C) TOTALPUMPE Display of the operating time of the pump since the initial device startup in hours. The value is displayed digit by digit by the LEDs, with every LED standing for a numeric value from 0-9 in accordance with its number. Digit value "0" Digit value "1" Digit value "2" The display is repeated after a pause. Example: The pump has been in operation for 32 hours since the initial device startup. The LEDs light up in the following order: Digit value "3" Digit value "4" Digit value "5" Digit value "6" - PAUSE - Digit value "7" Digit value "8" Digit value "9" 98 English 5.906-432.0 Rev. 00 (06/15)

7.24 Servicefunktionen mit Displayanzeige 1 Setting, water temperature Service mode If the service switch is in the "Service" position (screwdriver symbol) upon switching on the device, the service mode of the device is activated (pump is not running). Selection of the service functions The available service functions are selected via the water temperature setting. Example: 30 C is equivalent to the function "Switch-off after 30 minutes of continuous operation". For some functions the function selection must already be set upon switching on the device and the service switch must be kept in the "SET" position for 2-3 seconds. Example: "RFID recognition" is called up with the setting 45 C + "SET" upon switch-on. 1 Display Changing the settings The indication of the current setting takes place via the display on the control panel. By means of the pushbutton function of the service switch (continue to turn to "SET" position, switch snaps back to the "Service" position) the settings can be changed. The change is also shown on the display. Exiting the service mode Turn off the appliance. Set the service switch to the appropriate water hardness level or "OFF". Turn on the appliance. 1 Service position 2 Service switch English 5.906-432.0 Rev. 00 (06/15) 99

7.25 Set up the switching off process Display Explanation Remark 30 C Switch-off after 30 minutes of continuous operation is activated. Switching with SET Switch-off after 30 minutes of continuous operation is not activated (factory setting). Switching with SET 35 C Switch-off after 30 minutes of continuous break is activated. Switching with SET Switch-off after 30 minutes of continuous break is not activated (factory setting). Switching with SET 7.26 Set up the leakage behaviour Display Explanation Remark 40 C Switch-off after 10 short startups activated (factory setting). Switching with SET Switch-off after 10 short startups is not activated. Switching with SET 100 English 5.906-432.0 Rev. 00 (06/15)

7.27 RFID query Display Explanation Remark 45 C + SET Device is equipped with RFID. Device is not equipped with RFID. Check the setting when replacing the printed circuit board. Menu access: Select 45 C Switch off device. Hold SET. Turn on the machine. Release SET. Select settings with SET. Menu access: Select 45 C Switch off device. Hold SET. Turn on the machine. Release SET. Select settings with SET. 7.28 Brightness value of the flame sensor Display Explanation Remark 45 C Test flame sensor. Display brightness value. <471: bright >=471: dark 7.29 Testing the temperature sensor Display Explanation Remark 50 C Test temperature sensor Indication temperature. 0 C is displayed when the temperature is below 0 C. English 5.906-432.0 Rev. 00 (06/15) 101

7.30 Testing the water temperature setting and the programme switch Display Explanation Remark 55 C Output image for temperature selector switch test. Use SET to access the temperature selector switch test. Temperaturwahlschaltertest. Es wird die am Temperaturwahlschalter gewählte Temperatur angezeigt. Main switch test Wenn der Temperaturwahlschaltertest fertig ist, muss wieder 55 C gewählt werden. Mit SET gelangt man in den Hauptschaltertest Main switch test Main switch test Main switch test This display appears only very briefly as the device is also switched off here. 7.31 Test service switch Display Explanation Remark 60 C Selected liquid softener setting. 102 English 5.906-432.0 Rev. 00 (06/15)

7.32 Testing the sensors Display Explanation Remark 65 C Description from left to right: Level stage fuel sensor (stage 7 of 8) Thermal motor protection switch open. Oil refill container not empty Exhaust thermostat open. Water shortage safeguard open Level stage detergent 1 (stage 1 of 4) Liquid softener container is empty On pressure switch pressed Off pressure switch pressed Level stage detergent 2 (stage 2 of 4) Description from left to right: Level stage fuel sensor (stage 7 of 8) Thermal motor protection switch closed Oil refill container not empty Exhaust gas thermostat closed Water shortage safeguard closed Level stage detergent 1 (stage 1 of 4) Liquid softener container is full On pressure switch not pressed Off pressure switch not pressed Level stage detergent 2 (stage 2 of 4) In case of a cable break with a level sensor no stage is displayed. If a level sensor has a cable break, no stage is displayed. English 5.906-432.0 Rev. 00 (06/15) 103

7.33 Error memory Note Use SET to switch over to the next fault. With switch-off - hold SET - switch-on the fault memory can be deleted. Display Explanation Remark 70 C Mains voltage too high Check the supply voltage. Mains voltage too low Check the supply voltage. Motor current too high Motor sluggish or phase failed. Check the mains connection. Motor asymmetric Phase failed. Check the mains connection. Thermal motor protection switch open. Engine is overheated Motor sluggish. Check the mains connection. Dry running of the pump (2 minutes) Ensure water supply. Check water shortage safe guard. Water shortage safeguard is sticky (reed switch or magnetic piston) Check water shortage safe guard. Oil refill container empty Refill lubricating oil. Check the float of the oil refill container. 10 short startups took place due to leakage Rectify leaks in the highpressure system. 104 English 5.906-432.0 Rev. 00 (06/15)

Display Explanation Remark Exhaust thermostat has triggered. Decarbonize boiler. Check exhaust gas thermostat. Cable break or short circuit with water temperature sensor Check temperature sensor. Flame sensor does not detect a flame although the burner was switched on Clean the looking glass. Check fuel supply. The flame sensor recognised bright although the burner was off RFID write-read electronics defective. Incidence of secondary light at the flame sensor. Combustion chamber scaled. Solenoid valve does not close. RFID write-read electronics is defective - replace. Cable break with level sensor fuel occurred Check level sensor fuel. Cable break with level sensor detergent tank 1 occurred Check level sensor RM 1. Cable break with level sensor detergent tank 2 occurred Check level sensor RM 2. Software version 1.1 This is no fault. Error merely appears for design reasons, because the display is in the error menu. English 5.906-432.0 Rev. 00 (06/15) 105

7.34 Operating hours Display Explanation Remark 75 C Indication of the consumed RM 110/111 bottles. 7.35 Gun switching operations since gun service Display Explanation Remark 80 C Number of gun switching operations since the last maintenance Maintenance after 80000 gun switching operations 7.36 Gun services Display Explanation Remark 85 C Number of gun maintenances Delete service. Turn off the appliance. Hold SET (2-3 seconds). Turn on the appliance. Note The fault memory is also deleted. 7.37 Gun services since initial startup Display Explanation Remark 90 C Number of total gun switching operations 106 English 5.906-432.0 Rev. 00 (06/15)

7.38 Operation duration of the burner since startup Display Explanation Remark 95 C Operation duration burner since the last maintenance Maintenance after 400 burner hours. 7.39 Burner service Display Explanation Remark 100 C Number of burner maintenances Delete service. Turn off the appliance. Hold SET (2-3 seconds). Turn on the appliance. Note The fault memory is also deleted. 7.40 Burner operation since initial startup Display Explanation Remark 112 C Total operation duration burner 7.41 Operating hours of the pump since pump service Display Explanation Remark 125 C Operation duration pump since the last maintenance Maintenance after 600 pump hours. English 5.906-432.0 Rev. 00 (06/15) 107

7.42 Pump services Display Explanation Remark 140 C Number of pump maintenances Delete service. Turn off the appliance. Hold SET (2-3 seconds). Turn on the appliance. Note The fault memory is also deleted. 7.43 Pump operation since initial startup Display Explanation Remark 155 C Total operation duration of the pump 108 English 5.906-432.0 Rev. 00 (06/15)

7.44 Quick overview for reading the service functions Turn off the appliance. Make a note of the position of the service switch. Set the service switch to Service. Turn on the appliance. Set temperature regulator to the relevant temperature. 30 (30/20) C - Behaviour after 30 minutes of continuous operation. 35 (34/32) C - Behaviour after 30 minutes of stand-by. 40 (37/34) C - Behaviour in case of leakage. 45 (40/35) C - Brightness flame sensor. 45 (40/35) C and Set upon switch-on - device with/without RFID 50 (43/36) C - Temperature at the temperature sensor. 55 (46/38) C - Function check programme switch and temperature controller. 60 (48/40) C - Function check service switch. 65 (50/42) C - Input test (level oil pump, pressure switch ON, winding protection motor, level fuel, level chem1, water shortage safeguard, pressure switch OFF, exhaust gas thermostat, level system care, level chem2). 70 (52/44) C - Display fault memory and software function (overvoltage, low voltage, excess current, phases asymmetric, winding protection motor, dry running, water shortage safeguard is stuck, oil shortage pump, leakage, exhaust gas thermostat, temperature sensor, flame sensor without light, flame sensor with light, RFID defective, software version). 75 (55/45) C - Bottle consumption system care RM 110/111. 7.45 Reset of the maintenances Display "Service" is on and the device functions completely normal. Description applies to HDS devices with indicator lights on the control panel. When resetting the maintenances, the fault memory is also deleted. (Delete faults only: Temperature controller to 70 (52/44) C and SET upon switch-on). Maintenance due as one or several of the following conditions has been reached: 80000 gun switching operations, 400 burner hours or 600 pump hours. Print and cut out template (page 13). Hold the template against the indicator lights on the control panel. Select the service mode. (Switch off the device, put the service switch to "Service", switch on device). Query gun switching operations: Temperature controller to 80 (58/46) C. 80 (58/46) C - Gun switching operations since the last gun service (maintenance every 80000 switching operations). 85 (60/48) C - Number of gun services. 85 (60/48) C and Set upon switch-on - delete gun service and fault memory. 90 (63/50) C - Total gun switching operations. 95 (66/52) C - Operating hours since last burner service (maintenance every 400 h). 100 (68/54) C - Number of burner services. 100 (68/54) C and Set upon switch-on - delete burner service and fault memory. 112 (70/55) C - Total operating hours burner. 125 (74/56) C - Operating hours since last pump service (maintenance every 600 h). 140 (77/58) C - Number of pump services. 140 (77/58) C and Set upon switch-on - delete pump service and fault memory. 155 (80/60) C - Total operating hours pump. Turn off the appliance. Bring the service switch back into the position taken down before. Turn on the appliance. Note 1. Value without brackets concerns all standard devices. 1. Value in brackets for devices up to max. 80?. 2. Value in brackets for devices up to max. 60?. Maintenance is due after 80000 switching operations. Perform maintenance when necessary. Reset gun maintenance: 85 (60/48) C and hold SET upon switch-on. Query burner hours: Temperature controller to 95 (66/ 52) C. Maintenance is due at 400h. Perform maintenance when necessary. Reset burner maintenance: 100 (68/54) C and hold SET upon switch-on. Query pump hours: Temperature controller to 125 (74/ 56) C. Maintenance is due at 600h. Perform maintenance when necessary. Reset pump maintenance: 140 (77/58) C and hold SET upon switch-on. Note 1. Value without brackets concerns all standard devices. 1. Value in brackets for devices up to max. 80?. 2. Value in brackets for devices up to max. 60?. English 5.906-432.0 Rev. 00 (06/15) 109

7.46 Overview of a quick check of the device status Read the fault memory in service mode at 70 (52/44) C. Every fault type is saved only once, together with the passed hours since it has last occurred. Overvoltage detected hours ago: Advance with "SET". Low voltage range detected hours ago: Excess current detected hours ago: Current asymmetry detected hours ago: Tripped winding protection motor detected hours ago: 2 minutes dry running detected hours ago: Stuck water shortage safeguard detected hours ago: Oil shortage in pump detected hours ago: Leakage (10 short startups) detected hours ago: Triggered exhaust gas thermostat detected hours ago: Faulty temperature sensor for water detected in hours: Flame sensor detects too little light hours ago: Flame sensor detects light hours ago: Reading error RFID electronics detected hours ago: OOOO end of the fault memory reached. OOOO display of the software version. 110 English 5.906-432.0 Rev. 00 (06/15)

7.47 Settings, burner 1 Pressure line to the burner 2 Fuel pump 3 Suction hose, fuel 4 Adjustment screw, fuel pressure 5 Return hose to the fuel tank Measure water temperature Install the shut-off valve with thermometer (special tool) on the appliance outlet. Switch on the burner and bring the appliance to working pressure with full water volume via the shut-off valve. Let the device run in burner operation for approx. 5 minutes until the maximum water temperature is reached. Measure the increase in water temperature (water outlet temperature minus water supply flow temperature). For target values refer to technical specifications. Measure the soot value, CO2 content and the exhaust temperature (special tools, measuring gauges). 1 Air door, air volume adjustment 2 Stop screw Adjusting the fuel pressure Set the fuel pressure (and water temperature) via the set screw. For target values refer to technical specifications. Adjusting the soot value If the soot value is too high, then the air flap needs to be opened further or the fuel pressure needs to be reduced. Adjust the CO 2 value Adjust the CO 2 value by moving the air flap. Open the air flap, the CO 2 content is decreasing. Note An accurate basic adjustment of the burner is only possible if the heating coil was previously thoroughly desooted and the deposits were removed.eine exakte Grundeinstellung des Brenners ist nur möglich, wenn die Heizschlange vorher gründlich entrußt und die inneren Ablagerungen entfernt wurden. Note After finishing the basic adjustment, the fuel pump and the air flap must be sealed. English 5.906-432.0 Rev. 00 (06/15) 111

7.48 Installation air duct on the outer jacket 1 Clamp ring 2 Air guidance 3 Exterior coat Clean the air duct and the outer jacket in the installation area. Install the air duct on the outer jacket. Grease clamping ring. Insert the clamping ring up into the air duct up to the noticeable stop. Note When installing the outer jacket (booster heater) in the device, the air duct can fall off the outer jacket. This leads to an aggravated installation. An additional clamping ring serves as installation aid. Note Ensure correct seating of the air duct. 1 Lock handles 2 Exterior coat 3 Clamp ring 4 Air guidance 112 English 5.906-432.0 Rev. 00 (06/15)

7.49 Adjusting the working pressure with the rotary regulator on the gun 7.49.1 Setting the maximum working pressure 1 Adjustment screw, high pressure 2 Lock nut, adjustment screw, high pressure 3 Spindle, pressure and quantity regulation 4 Adjustment screw, low pressure 5 Lock nut, adjustment screw, low pressure 6 Housing, overflow valve Install the test manometer (special tool) to the highpressure connection. Connect the high-pressure hose with gun and rotary regulator to the test manometer. Screw in the twist grip of the pressure and volume regulation on the pump all the way to the stop (towards "+"). Turn the rotary regulator to the position with the lowest pressure at the nozzle (towards "-"), open gun and let the device run. Pull off the rotary handle. Loosen the locknut of the adjustment screw for high pressure. Turn the adjustment screw high pressure in a way that the opening pressure of the overflow valve is reached on the test manometer. Note If this screw is turned clockwise, the pressure is increased; and if it is turned counter-clockwise, the pressure is decreased. After adjustment, secure the adjustment screw high pressure by means of a lock nut. Check the working pressure, feed volume and switch points of the pressure switches. Seal the adjustment screw for high pressure and the lock nut with safety lacquer. Note The rotary regulator is used to adjust the opening pressure of the overflow valve. English 5.906-432.0 Rev. 00 (06/15) 113

7.49.2 Setting the minimum working pressure 1 Adjustment screw, high pressure 2 Lock nut, adjustment screw, high pressure 3 Spindle, pressure and quantity regulation 4 Adjustment screw, low pressure 5 Lock nut, adjustment screw, low pressure 6 Housing, overflow valve Fasten the test manometer to the high-pressure connection. Connect the high-pressure hose and gun to the test manometer. Install the new high pressure nozzle. Completely open the control knob on the gun (turn towards "+"). Actuate the trigger on the gun and switch on the appliance. Rotate the rotating handle of the pressure regulator on the pump anti-clockwise (direction "-") all the way to the stop. Pull off the rotary handle on the pressure regulator. Loosen the locknut of the adjustment screw for low pressure. Turn the adjustment screw low pressure together with the spindle until the minimum working pressure of the overflow valve is reached on the test manometer (see technical data, partial load). Note If this screw is turned clockwise, the pressure is increased; and if it is turned counter-clockwise, the pressure is decreased. Secure the adjustment screw for low pressure by tightening the locknut. Check the working pressure, feed volume and switch points of the pressure switches. Then seal this setting. Note With minimum pressure and volume adjustments and when using the supplied steam nozzle, the pressure must not exceed 32 bar. 114 English 5.906-432.0 Rev. 00 (06/15)

7.50 Setting the working pressure with standard gun without rotary knob 7.50.1 Setting the maximum working pressure 1 Adjustment screw, high pressure 2 Lock nut, adjustment screw, high pressure 3 Spindle, pressure and quantity regulation 4 Adjustment screw, low pressure 5 Lock nut, adjustment screw, low pressure 6 Housing, overflow valve Fasten the test manometer to the high-pressure connection. Connect high-pressure hose with standard gun to the test pressure gauge. Install the new high pressure nozzle. Open standard gun. Turning on the appliance. Screw in the twist grip of the pressure and volume regulation on the pump all the way to the stop (towards "+"). Pull off the rotary handle. Loosen the locknut of the adjustment screw for high pressure. Turn the adjustment screw high pressure in a way that the opening pressure of the overflow valve is reached on the test manometer. Note If this screw is turned clockwise, the pressure is increased; and if it is turned counter-clockwise, the pressure is decreased. Secure the adjustment screw for high pressure by tightening the locknut. Check the working pressure, feed volume and switch points of the pressure switches. Then seal this setting. Note The maximum working pressure is set with the standard gun without control knob. English 5.906-432.0 Rev. 00 (06/15) 115

7.50.2 Setting the minimum working pressure 1 Adjustment screw, high pressure 2 Lock nut, adjustment screw, high pressure 3 Spindle, pressure and quantity regulation 4 Adjustment screw, low pressure 5 Lock nut, adjustment screw, low pressure 6 Housing, overflow valve Fasten the test manometer to the high-pressure connection. Connect high-pressure hose with standard gun to the test pressure gauge. Install the new high pressure nozzle. Open standard gun. Turning on the appliance. Rotate the rotating handle of the pressure regulator on the pump anti-clockwise (direction "-") all the way to the stop. Pull off the rotary handle. Loosen the locknut of the adjustment screw for low pressure. Turn the adjustment screw low pressure and the spindle until the minimum working pressure is reached. Note If this screw is turned clockwise, the pressure is increased; and if it is turned counter-clockwise, the pressure is decreased. Secure the adjustment screw for low pressure by tightening the locknut. Check the working pressure, feed volume and switch points of the pressure switches. Then seal this setting. 8 Care and maintenance Service group does not contain any maintenance and inspection points. Note With minimum pressure and volume adjustments and when using the supplied steam nozzle, the pressure must not exceed 32 bar. 116 English 5.906-432.0 Rev. 00 (06/15)

9 Troubleshooting Failure Measure Device is not running (no LED/display indication) Check/replace mains voltage, connecting cable and mains fuse. Check the fuse (F1). Check/replace the power switch. Check/replace the pressure switch Check/adjust/replace control transformer. Check/replace the temperature fuse. Check/replace the PCB. Unplug the RFID cable from the PCB and switch RFID in the software. Device is not running, LED standby is on or the Check pressure switch electrically and mechanically. display shows three filling levels Winding protection contact was triggered Switch off appliance and let it cool down. Remove the cause of the problem. Turn on the appliance again. Water pressure too low Check/raise the water input amount. Check/clean/replace water fine filter. Vent appliance. Check/replace high-pressure nozzle. Check/replace the pressure and suction valves Check / adjust/ replace overflow valve. Check/adjust/replace safety valve. Water is not being heated Check/correct temperature setting. If the water shortage safeguard is switched off, ensure sufficient water supply/repair water shortage safeguard. Check/refill fuel level in the tank. Check/replace the solenoid valve fuel pump. Check/replace fuel filter. Check/correct the setting of the fuel pump. Check/correct fuel nozzle. Check/replace ignition cables. Check/correct distances of the ignition electrodes. Check/repair burner blower. Check/correct setting of the air flap. Control LED is on 5.4.1Control panel with LED indicator During operation, all 10 LEDs are blinking at the Check service switch and ribbon cable. same time, device switches off Inadequate or no detergent function Check/correct dosing valve setting. Check/clean detergent tank. Check/clean/replace detergent filter. Check/replace detergent hose, dosing valve and detergent inlet at the cylinder head. Pressure reduction in the HP system Check the trigger gun and the O-rings on the high-pressure hose for leaks / replace. Check the pressure holding valve for leaks/replace the O- rings. Check / adjust/ replace overflow valve. Check/replace the pressure switch and control piston. Water leak between the cylinder head and the piston casing Leakiness of 1 drop per minute and piston is acceptable. Check/replace high pressure and low pressure seals. Oil leaks between the cylinder head and the piston Replace the oil seals. casing Pump is vibrating Check pump for leaks/eliminate leaks. Vent appliance. English 5.906-432.0 Rev. 00 (06/15) 117

9.1 Error messages Display Explanation Remark Rotating field of the motor incorrect. Perform a phase inversion in the commutating pole plug. Thermal motor protection switch (WSK) in the motor has tripped. Switch off the device and allow the motor to cool down. Mains voltage too low or too high or phase failed or the motor current is too high. Check power supply. Check the pump for sluggishness. Water shortage (dry running after 2 minutes). Open tap. Ensure water supply. Exhaust temperature is too high Perform maintenance on the burner. Time monitoring active for 30 minutes, continuous break/continuous operation Switch the device off and back on. 118 English 5.906-432.0 Rev. 00 (06/15)

9.2 Error message with service demand Note One display for multiple faults is used here. By reading the fault memory, the fault can possibly be localized. (Service mode 70 C) Display Explanation Remark Water shortage safeguard (reed switch or magnetic piston is sticky). Check water shortage safe guard. 10 short startups/leakage. Rectify leaks in the HP system. Contactor does not switch. Check contactor. Check installation of the current transformer. This fault is not saved. Water temperature sensor (NTC) defective. Check NTC. Cable NTC scraped blank or interrupted. Flame sensor detects condition that is not permitted. RFID write-read electronics defective. Possible causes: Fuel solenoid valve Fuel line/filter Stray light Sight glass sooted Combustion chamber scaled Fuel empty and fuel empty message defective Check connection to the RFID write-read electronics. English 5.906-432.0 Rev. 00 (06/15) 119

10 Technical specifications Appliance type Appliance no. Circuit diagram Operating instructions Spare parts list HDS 7/12-4 M 1.077-410.0 0.089-021 5.964-883.0 5.972-064.0 HDS 7/12-4 MX 1.077-450.0 0.089-021 5.964-883.0 5.972-064.0 HDS 8/18-4 M 1.077-609.0 0.089-025 5.964-883.0 5.972-275.0 HDS 8/18-4 MX 1.077-650.0 0.089-025 5.964-883.0 5.972-275.0 HDS 9/18-4 M 1.077-810.0 0.089-025 5.964-883.0 5.965-902.0 HDS 9/18-4 MX 1.077-850.0 0.089-025 5.964-883.0 5.965-902.0 HDS 10/20-4 M 1.071-420.0 0.088-952 5.964-883.0 5.971-982.0 HDS 10/20-4 MX 1.071-456.0 0.088-952 5.964-883.0 5.971-982.0 HDS 12/18-4 S 1.071-620.0 0.088-952 5.964-883.0 5.972-173.0 HDS 12/18-4 SX 1.071-650.0 0.088-952 5.964-883.0 5.972-173.0 HDS 13/20-4 S 1.071-800.0 0.089-026 5.965-833.0 5.972-204.0 HDS 13/20-4 SX 1.071-850.0 0.089-026 5.965-833.0 5.972-204.0 10.1 Tightening torques Cylinder head screws Piston casing Gun, pressure regulator High pressure outlet Pressure valve screw connection Pressure valve screw connection Suction valve screw connection Overflow valve seat Swash plate Oil drain screw Motor cover, rear Blower wheel 50-60 Nm 5-7 Nm 40 Nm 6-8 Nm 40-45 Nm 30-35 Nm 15-17 Nm 8-10 Nm 12 +/- 3 Nm 20-25 Nm 9-10 Nm 7-8 Nm 120 English 5.906-432.0 Rev. 00 (06/15)

11 Special tools Electric measuring appliance 6.803-022.0 Shut-off valve with thermometer 2.901-030.0 Removal pliers, pressure/suction valves and water sieves 4.901-062.0 Installation mandrel oil seal, high-pressure seal Piston diameter 18mm Installation sleeve, high pressure seal Piston diameter 18mm Installation mandrel oil seal, high-pressure seal Piston diameter 20mm Installation sleeve, high pressure seal Piston diameter 20mm Installation mandrel oil seal Piston diameter 22mm Installation mandrel high pressure gasket Piston diameter 22mm Installation sleeve, high pressure seal Piston diameter 22mm 5.901-062.0 5.901-118.0 5.901-055.0 5.901-194.0 5.901-064.0 5.901-018.0 5.901-136.0 Test manometer for working pressure 4.742-025.0 Disassembly overflow valve seat Assembly overflow valve seat 5.901-161.0 5.901-162.0 English 5.906-432.0 Rev. 00 (06/15) 121

Soot pump Soot filter paper Soot pattern scale Thermometer Hardness indicator A Indicator paper Obtain recommended measuring devices, Testo 320 or Testo 320-2-LL - measuring device CO2, directly from the supplier. Note Additionally required for both measuring devices: Power Supply Device case Flue gas probe 6.775-001.0 6.775-002.0 6.775-003.0 6.432-029.0 6.768-004.0 6.768-006.0 Puller for swashing plate 4.901-038.0 Pressure gauge for fuel pressure 4.901-060.0 Installation mandrel for O-ring/support ring, overflow piston 5.901-163.0 122 English 5.906-432.0 Rev. 00 (06/15)